By Topic

Control of circulating current for direct parallel grid-connected inverters in photovoltaic power generation

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$33 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

3 Author(s)
Suo Ji ; Department of Electronic Information Engineering, Suzhou Vocational University, Jiangsu Province, 215104, China ; Yang Yong ; Qi Chunqing

The generating mechanism of circulating currents for direct parallel photovoltaic grid-connected inverters is analyzed in detail at first. Then state average model of the parallel photovoltaic grid-connected inverters is constructed in dq rotating coordinates. Based on this model, interaction between the parallel photovoltaic grid-connected inverters is analyzed and the influence on circulating current when it is used zero vectors with space vector pulse width modulation (SVPWM) is also analyzed. The paper adopts a novel method based on which the circulating current can be effectively inhibited by controlling the operation time for different zero vectors in each PWM cycle. The simulated and experimental results show that the control strategy can effectively inhibit circulating current, so the feasibility and correctness.

Published in:

2009 International Conference on Mechatronics and Automation

Date of Conference:

9-12 Aug. 2009